Sound Travels as a Wave

Question 1

What are sound waves?

Answer 1

Longitudinal waves caused by vibrating objects

Question 2

What are the vibrations passed through?

Answer 2

The surrounding medium as a series of compressions

Question 3

What may the sound eventually reach?

Answer 3

Someone’s eardrum, at which point the person might hear it

Question 4

What is a human ear capable of hearing frequencies of?

Answer 4

Between 20Hz and 20,000 Hz

Question 5

What does it mean because sound waves are caused by vibrating particles?

Answer 5

In general the denser the medium, the faster sound travels through it

Question 6

What do sounds wave generally travel faster in?

Answer 6

Solids rather than in liquids, and faster in liquids than in gases

Question 7

What will sound waves be reflected by?

Answer 7

Hard flat surfaces

Question 8

What do things like carpets and curtains act act as?

Answer 8

Absorbing surfaces, which will absorb sounds rather than deflect them

Question 9

What will sound waves also do as they enter different media?

Answer 9

Refract (change direction)

Question 10

What do sound waves do as they enter denser material?

Answer 10

They speed up

Question 11

See diagrams page 36

Answer 11

Ok